One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6,8,13,9,12,17,11)(7,10,15,19,16,18,14,20)(21,22,26,28,25,30,24,29)(23,27,33,35,31,36,32,34)(1,2,4,3)(5,7,8,15,9,16,17,14)(6,10,13,19,12,18,11,20)(21,23,24,32,25,31,26,33)(22,27,29,34,30,36,28,35)(6,11)(7,14)(8,17)(10,18)(12,13)(15,16)(22,28)(23,31)(24,26)(27,34)(29,30)(35,36) involution — undirected(1,3,4,2)(6,12)(10,18)(11,13)(19,20)(21,24,25,26)(22,28,30,29)(23,32,31,33)(27,35,36,34)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.